The Steel Coated With Boron Was Hardened 10 Times. Cumhuriyet University Engineering Faculty Metallurgical and Materials Engineering Department Lecturer Assist. Assoc. Dr. Kumruoğlu stated that in the project, in which researchers from Sheffield University in England, Paton Electric Welding Institute in Ukraine and Sakarya University participated, they hardened the steel they covered with boron 10 times with the "plasma electrolysis" method.
In his statement to the AA correspondent, Kumruoğlu said that they are working with important institutions and researchers in the UK and Ukraine within the scope of their doctoral thesis on "Surface modification processes applied to steels with electrolytic plasma technology".
In the study he started in 2007, when he was working at Sakarya University, Faculty of Engineering, Prof. Dr. Fatih Üstel, thesis advisor Assoc. Dr. Ahmet Özel, Prof. from Sheffield University in England. Dr. Allan Matthews and Dr. Stating that Alexey Yerokhin and researchers from Ukraine Paton Welding Institute took part, Kumruoğlu stated that they had positive results in the study that lasted for about 6 years.
Expressing that they took the systems they developed in Ukraine and England to a much higher level at the Surface Technologies Laboratory at Sakarya University, Kumruoğlu stated that they also made various national and international publications on this subject.
Assist. Assoc. Dr. Kumruoğlu noted that 70 percent of the world's reserves are in Turkey, and that boron is an extremely important element from a strategic point of view.
Expressing that there are many different demands regarding the use of boron from the chemistry, agriculture, pharmaceuticals, glass, construction, cement, automotive and aircraft industries, Kumruoğlu said, “In addition to the technological developments in recent years, the elemental use of boron in coatings has become extremely important. Boron, which is smaller than other elements due to its atomic structure, can form very strong (hard) structures.
Pointing out that for this reason, both domestic and foreign scientists have focused on boron coatings in recent years, Kumruoğlu said:
“As a team, we carried out studies in the field of surface engineering of boron. We aim to use boron as a supportive, intrusive coating or as an auxiliary element. There were some problems with the boron-related coatings. For the coating made by the method known as high temperature diffusion, high temperatures such as about 1000 degrees and long periods such as 8-10 hours are required. This leads to a very high energy consumption. At the same time, such a high temperature degrades the structure of the steel or other metals coated. This is not very efficient from an engineering point of view. Apart from this, there is the 'plasma electrolysis' method that we prefer. This coating method is extremely popular because it is in a cold electrolyte and is extremely simple. In recent years, we have been seeing an attack in this technology, the foundations of which were laid by Russian scientists.”
-20 micron coating depth
Noting that after modifying this method and developing it technically and methodically, they coated many different steels with boron in the Surface Technologies Laboratory at Sakarya University, Kumruoğlu said, “We do the coating in aqueous boron solution. We perform the heating process only in the plasma that we create on the surface of the steel. We create a coating depth of approximately 20 microns on the surface of the steel with the bombardment we create with high tension. This is an enormous boron coating depth,” he said.
Expressing that they also coated with nitrogen, oxygen and carbon apart from boron, Kumruoğlu stated that they achieved the most important result with boron, adding, “The steel, whose initial hardness was 150 HV, reached 5 HV after 1500 minutes of processing. In the wear tests, we achieved an increase of approximately 7 times in the wear resistance of the steel.”
Assist. Assoc. Dr. Levent Cenk Kumruoğlu stated that they did not compromise the original internal durability of the steel, whose hardness was increased 10 times, and that this result was achieved thanks to the very short coating time.
Kumruoğlu stated that they have the technology to coat many square meters of surfaces with the plasmatron integrated into the CNC workbench, and that many samples can be coated one after the other, and that they have made the system ready for automation.
Expressing that the steel coated with boron obtained through the work they completed in June 2013 can be used in many areas such as automotive, defense, manufacturing industry and implant materials, Kumruoğlu emphasized that the method is extremely environmentally friendly.
Kumruoğlu added that he continues his studies in this direction at Cumhuriyet University, where he started working in August this year.
Source : konya.net.tr